Improvement in eotary valves



ENOS D. WOOD, OF UTIOA, NEW YORK.

Letters Patent No. 76,682, dated April 14, 1868.

IMPROVMET IN ROTARY VALVES.4

tlgt Sunnah narrante in tigcse trttcrs atnit mit matting gint et tige smite.

TO ALL WHOM I'I MAY OONOERN:

Be it linowu that I, ENOS D. WOOD, of Utica,New York, have invented a new and useful Improvement in Valves for Steam-Engines; and I do hereby declare that the following is a full, clear, and exact description of my said invention, and of the mode of opcrationof the same, reference being had to the annexed drawings, makingl a part of this specification, in which- Fignre l represents a cross-section of thevalve-casing and an end view of the valves.

Figure 2, a longitudinal sectionof the casing. l

Figure 3, an end view of the hub and valves; and

Figure 4, a longitudinal section ofthe same.

A is the valve-casing or sleeve.

B B are the steam-ports therein.

C C, chambers on the inside ofthe easing.

D D,'parts of the'circular valve cut away.

E is the hub of the valves. l

F -F, arms connecting thevhub with the valves.

G G'r, the valves.

H H, openings through the valv cs. v

improved valve is ofthe rotating or oscillating form, and may be nscd'-for inlet and exhaust or governorvalves, and especially for cut-oil` valves.

I make the valve-casing or sleeve in thc ordinary form, circular, and slightly tapering through the sides, while a space is cut away on the inside, between the ports, so as to form chambers or recesses O C therein from end to end of the casing. v y

Instead of making the valve circular also, with ports through it, corresponding with those in the casing, I cut away the periphery down to the hub, as seen at D D, leaving between such spaces a separate valve, G, These valves G are connected with the hub E by the arms F F, leaving the space with the ports cut for cach port in the casing. II between the hub E and the valve G, as seen in the drawing.

'lhe purposes of these improvements and their value will be obvious.

By removing the inner surface of the casing at O, unnecessary wear oi' the friction, are obviated, while the steam passing through such spaces or chambers O C also serves to lubricatc and balance the valves. By dividing the circular valve into longitudinal parts equal in number tothe ports in the casing, the same effect is produced-less wear and friction-while a more perfect seat for the valve is obtained, and by connecting the valves to the hub by the arms F F, instead of making them solid with the hub, elasticity is given to the valves, which prevents the setting or binding of the valve in the casing, especially at the centre of the valve, as is the case where the valve is in the usual form, solid, with ports only, and there can be no yielding of the parts. And the openings II-II at the saine time allow the steam to pass freely through the valve and casing, and much valve, and thus render it perfectly self-balanced.

Instead et' connecting the valves with the huh bythe arms F, the valves may be separate, and set in slots in the hub, or the ends of the arms F may he set in holes in the valves, with springs between the parts, that is, in the holes er slots; and, instead of the arms being cast with the huh, they may be of wrought iron or`steel,

properly attached to the hub and valves, to give greater elasticity to the valves.

Having thus described my invention, what I ciaini therein Yas new, and desire to secure by Letters Patent, is`

,The valves G, with the openings ll between them and the hub E, constructed substantially as described.

Enos D. woon.

Witnesses:

Guo. M. WEAVER, Jeun G. Cnocnnn. 

